Conference proceeding
Deformation of high solute aluminum alloys and the inhibition of GP zone formation
Solid-Solid Phase Transformations in Inorganic Materials 2005, Vol 1, pp.321-326
01 Jan 2005
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In order to determine the relative effectiveness of solute in solution versus it clustered into GP zones on promoting strain hardening, a series of rolling experiments were carried out on 2524, an Al-Cu-Mg-Mn alloy, after different periods of natural aging. The results clearly show that as the alloy is naturally aged, forming GP zones, the strain hardening increment falls, for a given reduction. This is accompanied by a parallel fall in electrical conductivity, of which the magnitude decreases with the formation of GP zones. once again indicating a reduction in dislocation retention when the solute forms clusters. It was also found after a rolling reduction to a strain of 0.4, that the hardness rise and electrical conductivity fall characteristic of natural aging is totally inhibited. For a smaller rolling strain of only 0.1. there is a small residual hardness increment due to natural aging but this increment of hardening is only approximate to 15% of that found in the un-deformed sample. It is suggested that the loss of the natural aging response as a result of cold rolling is due to the loss of the excess quenched-in vacancies after solution treatment. These vacancies, needed for room temperature aging, appear to be absorbed by the dislocations introduced by cold rolling. Since the origin of solute enhanced strain hardening in Id rolled aluminum alloys is known to be solute inhibition of dynamic recovery, the present results indicate that this inhibition is less effective when the solute is clustered into GP zones.
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Details
- Title
- Deformation of high solute aluminum alloys and the inhibition of GP zone formation
- Creators
- Christopher J. HovanecRoger D. Doherty
- Contributors
- J M Howe (Editor)D E Laughlin (Editor)J K Lee (Editor)U Dahmen (Editor)W A Soffa (Editor)
- Publication Details
- Solid-Solid Phase Transformations in Inorganic Materials 2005, Vol 1, pp.321-326
- Publisher
- Minerals, Metals & Materials Soc
- Number of pages
- 6
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- [Retired Faculty]
- Identifiers
- 991019170594004721
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- Metallurgy & Metallurgical Engineering